라라벨 Encrypter

라라벨 Encrypter

1 Illuminate\Contracts\Encryption[ | ]

<?php

namespace Illuminate\Contracts\Encryption;

interface Encrypter
{
    public function encrypt($value);
    public function decrypt($payload);
}

2 Illuminate\Encryption[ | ]

<?php

namespace Illuminate\Encryption;

use RuntimeException;
use Illuminate\Contracts\Encryption\DecryptException;
use Illuminate\Contracts\Encryption\EncryptException;
use Illuminate\Contracts\Encryption\Encrypter as EncrypterContract;

class Encrypter extends BaseEncrypter implements EncrypterContract
{
    protected $cipher;

    public function __construct($key, $cipher = 'AES-128-CBC')
    {
        $key = (string) $key;
        if (static::supported($key, $cipher)) {
            $this->key = $key;
            $this->cipher = $cipher;
        } else {
            throw new RuntimeException('The only supported ciphers are AES-128-CBC and AES-256-CBC with the correct key lengths.');
        }
    }

    public static function supported($key, $cipher)
    {
        $length = mb_strlen($key, '8bit');
        return ($cipher === 'AES-128-CBC' && $length === 16) || ($cipher === 'AES-256-CBC' && $length === 32);
    }

    public function encrypt($value)
    {
        $iv = random_bytes($this->getIvSize());
        $value = \openssl_encrypt(serialize($value), $this->cipher, $this->key, 0, $iv);
        if ($value === false) {
            throw new EncryptException('Could not encrypt the data.');
        }
        $mac = $this->hash($iv = base64_encode($iv), $value);
        $json = json_encode(compact('iv', 'value', 'mac'));
        if (! is_string($json)) {
            throw new EncryptException('Could not encrypt the data.');
        }
        return base64_encode($json);
    }

    public function decrypt($payload)
    {
        $payload = $this->getJsonPayload($payload);
        $iv = base64_decode($payload['iv']);
        $decrypted = \openssl_decrypt($payload['value'], $this->cipher, $this->key, 0, $iv);
        if ($decrypted === false) {
            throw new DecryptException('Could not decrypt the data.');
        }
        return unserialize($decrypted);
    }

    protected function getIvSize()
    {
        return 16;
    }
}

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